Thursday, March30, 2017 L-36.com


Marine Weather and Tides
Vandenberg AFB, CA

Version 3.4
What's New / NOTES
5/19/2016 - There were issues with the 3 day airport observation history. I switched to another data source. Let me know if you see any issues with the data feeds.
3/12/2015 - Added section for Gulf current for users in the GMZ marine zones.
This was requested by a user. If you have requests, please let me know.

Sunrise 6:48AMSunset 7:23PM Thursday March 30, 2017 9:39 AM PDT (16:39 UTC) Moonrise 7:56AMMoonset 9:36PM Illumination 11% Phase: Waxing Crescent; Moon at 3 days in cycle
NOTE: Some of the data on this page has not been verified and should be used with that in mind. It may and occasionally will, be wrong. The tide reports are by xtide and are NOT FOR NAVIGATION.
Marine Forecasts
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PZZ673 Waters From Pt. Sal To Santa Cruz Island Ca And Westward 60 Nm Including San Miguel And Santa Rosa Islands- 917 Am Pdt Thu Mar 30 2017
.small craft advisory in effect until 1 pm pdt this afternoon...
.gale warning in effect from 1 pm pdt this afternoon through Friday afternoon...
Today..NW winds 20 to 25 kt...becoming 25 to 30 kt with gusts to 40 kt in the afternoon. Combined seas 10 to 12 ft dominant period 15 seconds. Patchy fog in the morning.
Tonight..NW winds 25 to 30 kt with gusts to 45 kt...becoming 20 to 25 kt with gusts to 35 kt after midnight. Combined seas 9 to 12 ft dominant period 12 seconds.
Fri..NW winds 20 to 30 kt with local gusts to 40 kt. Strongest northwestern portion. Combined seas 10 to 13 ft dominant period 12 seconds.
Fri night..NW winds 20 to 30 kt with local gusts to 35 kt... Becoming N 10 to 20 kt with local gusts to 25 kt after midnight. Combined seas 13 to 16 ft dominant period 12 seconds...subsiding to 10 to 13 ft dominant period 12 seconds after midnight.
Sat..N winds 15 to 20 kt with gusts to 25 kt...becoming nw 10 to 15 kt in the afternoon. Wind waves 2 to 4 ft. W swell 9 to 11 ft at 12 seconds...subsiding to 7 to 9 ft at 12 seconds in the afternoon.
Sat night..NW winds 10 to 15 kt. Wind waves 2 ft or less. W swell 7 to 9 ft at 12 seconds.
Sun..NW winds 20 to 30 kt with gusts to 40 kt. Combined seas 11 to 14 ft.
Mon..NW winds 20 to 30 kt with gusts to 40 kt. Combined seas 13 to 16 ft.
PZZ600 917 Am Pdt Thu Mar 30 2017
Synopsis for the southern california coast and santa barbara channel including the channel islands national marine sanctuary and national park..At 15z...or 8 am pst...a 1027 mb high pressure center was located 700 nm west of point conception. Winds will be elevated through early Saturday. Short period seas will dominate the waters.

7 Day Forecast for Marine Location Near Vandenberg AFB, CA
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location: 34.55, -121.24     debug


Area Discussion for - Los Angeles/Oxnard, CA
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Fxus66 klox 301140
afdlox
area forecast discussion
national weather service los angeles/oxnard ca
440 am pdt Thu mar 30 2017

Synopsis
An upper trough will move into the great basin later today and
tonight. Behind this system, widespread strong to locally damaging
winds will affect much of the region later today through early
Friday, and there will be significant cooling. High pressure and
weak offshore flow will bring warmer weather to the region this
weekend. A fast moving trough passing north of the area will cause
cooling early next week.

Short term (tdy-sat)
areas of low clouds have developed on the central coast and in the
santa ynez valley early this morning, and some clouds were getting
close to the salinas valley. Some stratus was also developing just
to the south of the los angeles county and patchy low clouds
could move into southern sections by daybreak. Otherwise, some
high clouds were drifting across the region. Low clouds should not
last too long this morning as a dry frontal system should wipe
out the marine inversion.

The main story will be the winds. The models have trended quite
a bit stronger with all parameters necessary for strong winds
across the region. Winds aloft will really increase later today,
with 850 mb winds peaking at around 60 kt near the i-5 corridor
and across southern santa barbara county this evening. The 2km wrf
actually shows 850 mb winds up to 75 kt, which is really quite
impressive. Also, widespread strong subsidence through a deep
layer will overspread the region, and there will be good cold
advection as well. Finally, a powerful 140 kt northerly jet will
be aimed toward or just east of the mountains this evening, an
ideal location for powerful winds. Expect high wind warning
level winds across the mountains of l.A., vtu and sba counties,
the antelope valley, the santa clarita valley and the south coast
of sba county. Wind gusts of 70 to 80 mph are expected in the
mountains, and 60 to 65 mph in the santa clarita valley and on the
south coast of sba county. Elsewhere, solid to strong wind
advisory level winds are expected in most areas.

Strong northwest winds will affect the central coast this
afternoon, with strong west winds near the l.A. And vtu county
coast. Then winds will turn northerly tonight. Especially
noteworthy is that strong north winds will likely again affect the
san fernando valley and coastal sections of l.A. County from
malibu to the hollywood hills, down through the westside. It is
also possible that mountain wave activity could produce brief
bursts of damaging winds in areas near lake casitas and near
the foothills in the san gabriel valley.

Winds will peak in most areas this evening through late tonight,
although sooner on the central coast. There will be significant
cooling today, with MAX temps down 8 to 14 degrees in most areas.

Low level flow will shift to a more north northeasterly direction
Friday morning. There is a chance that winds will linger into the
early afternoon Friday, so advisories may have to be extended in
some areas, or issued once the high wind warnings expire in other
areas. Skies should be mostly sunny on fri. MAX temps may edge up
slightly west of the mtns, but the air mass should be too cool
to allow for dramatic warming.

An amplifying upper ridge and weak to moderate offshore flow
should bring significant warming on sat, with MAX temps back into
at least the lower 80s in the valleys and possibly the interior
coastal plain. There will be some gusty NE winds across l.A. And
vtu counties, possibly to near advisory levels Sat morning.

Long term (sun-wed)
heights will lower a bit Sunday and low level flow will turn onshore
in the afternoon. This should bring slight cooling, especially to
the coastal plain, but temps will still be above normal. A broad
trough moving through the pac NW will dig across the northern
rockies on Monday, likely bringing additional cooling to the
region. On the latest runs, the ec is now sharper than the gfs
with the feature, and would result in more significant cooling
and breezy to windy conds. The 06z run of the GFS shows warming
for Tue and especially Wed as a ridge builds into the region from
the southwest. Confidence in the details of the forecast beyond
Monday is not particularly high.

Aviation 30/1140z
at 1100z at klax, there was no marine layer. There was a sfc based
inversion with a top near 1800 ft with a temperature of 20 deg c.

Good confidence in allVFR tafs. There is a 30 percent chc ofVFR
conds at ksmx by 15z. Strong NW to N winds will affect all taf
sites today. There is a high likelihood of mountain wave
activity. There will be mdt ocnl stg turbc over and around the
higher terrain from 18z on.

Klax... Good confidence inVFR taf. There is a 30 percent chc of
30 to 35 kt crosswinds 00z-09z.

Kbur... High confidenceVFR taf. Lgt ocnl mdt turbc sfc-150.

Marine 30/300 am
very good confidence in gale warnings and small craft advisories.

The strongest winds will be in the western portions of all zones.

Lox watches/warnings/advisories
Ca... High surf advisory in effect until 3 pm pdt Friday for zones
34-35. (see laxcfwlox).

Wind advisory in effect from noon today to 9 pm pdt this
evening for zones 34>36. (see laxnpwlox).

Wind advisory in effect until noon pdt today for zones
39-52>54-59. (see laxnpwlox).

High wind warning in effect from 2 pm this afternoon to 8 am
pdt Friday for zone 39. (see laxnpwlox).

Beach hazards statement in effect through Friday afternoon
for zones 40-41-87. (see laxcfwlox).

Wind advisory in effect from 2 pm this afternoon to 9 pm pdt
this evening for zone 40. (see laxnpwlox).

Wind advisory in effect from 2 pm this afternoon to 8 am pdt
Friday for zones 41-44-45-87-547. (see laxnpwlox).

Wind advisory in effect from 2 pm this afternoon to 6 pm pdt
this evening for zone 46. (see laxnpwlox).

High wind warning in effect from 6 pm this evening to 8 am
pdt Friday for zone 46. (see laxnpwlox).

High wind warning in effect from noon today to 8 am pdt
Friday for zones 52>54. (see laxnpwlox).

High wind warning in effect from noon today to 3 am pdt
Friday for zone 59. (see laxnpwlox).

High wind warning in effect from 2 pm this afternoon to 3 am
pdt Friday for zone 88. (see laxnpwlox).

Pz... Small craft advisory in effect until 3 pm pdt Friday for zone
645. (see laxmwwlox).

Small craft advisory in effect from noon today to 3 am pdt
Saturday for zones 650-655. (see laxmwwlox).

Small craft advisory in effect until 1 pm pdt this afternoon
for zones 670-673-676. (see laxmwwlox).

Gale warning in effect from 1 pm this afternoon to 3 pm pdt
Friday for zones 670-673-676. (see laxmwwlox).

Hazard potential outlook (sat-wed)
gusty northeast winds are possible Saturday across la/ventura
counties.

Public... Db
aviation... Rorke
marine... Rorke
synopsis... Db
weather.Gov/losangeles


Weather Reporting Stations
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Stations Dist Age Wind Air TempWater Temp WavesPressureDewPt
46218 - Harvest, CA (071) 25 mi39 min 53°F13 ft
46259 26 mi39 min 57°F12 ft
46257 26 mi39 min 53°F13 ft
HRVC1 30 mi51 min 1017.8 hPa
46011 - SANTA MARIA - 21 NM Northwest of Point Arguello, CA 30 mi49 min NW 16 G 19 55°F 55°F10 ft1018.3 hPa (-0.0)
PTGC1 - Point Arguello, CA 31 mi39 min N 26 G 31 54°F 1017.4 hPa (+0.0)
46054 - SANTA BARBARA W 38 NM West of Santa Barbara, CA 45 mi49 min NNW 25 G 29 55°F 54°F10 ft1016.2 hPa (+0.9)
46215 - Diablo Canyon, CA (076) 49 mi49 min 53°F8 ft

Wind History for Port San Luis, CA
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N23
G28
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NW14
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Airport Reports
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AirportDistAgeWind ktVisibilitySky/WeatherTempDewPtHumidityPressure
Lompoc, Vandenberg Air Force Base, CA38 mi1.7 hrsN 53.00 miFog/Mist52°F51°F100%1017.7 hPa

Wind History from VBG (wind in knots)
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Last 24hrN6N13N13N13N20
G26
N20N16N14
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N14N13N6N9N11N9N10N13N12N11N14N16
G22
N13N14
G19
N5--
1 day agoN7N14N13N14N17N20N19N16N18
G22
N12N6CalmNE12NE11NE13CalmN10N13NE12NE8N7CalmNW73
2 days agoN18
G22
N21NW17N22
G28
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G31
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G31
N28
G36
N25
G33
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G29
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G27
N19N17N13N14N15N15N12N10N12N11N11N7N8

Tide / Current Tables for Point Arguello, California
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Point Arguello
Click for Map
Thu -- 06:24 AM PDT     -0.25 feet Low Tide
Thu -- 06:51 AM PDT     Sunrise
Thu -- 08:53 AM PDT     Moonrise
Thu -- 12:42 PM PDT     4.11 feet High Tide
Thu -- 06:13 PM PDT     1.02 feet Low Tide
Thu -- 07:22 PM PDT     Sunset
Thu -- 10:33 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.34.93.92.71.40.3-0.2-0.10.41.42.53.444.13.732.11.411.21.82.73.74.6

Tide / Current Tables for Oil Platform Harvest (Topex Project), California
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Oil Platform Harvest (Topex Project)
Click for Map
Thu -- 06:18 AM PDT     -0.21 feet Low Tide
Thu -- 06:52 AM PDT     Sunrise
Thu -- 08:53 AM PDT     Moonrise
Thu -- 12:30 PM PDT     4.19 feet High Tide
Thu -- 06:04 PM PDT     1.06 feet Low Tide
Thu -- 07:22 PM PDT     Sunset
Thu -- 10:33 PM PDT     Moonset
Tide / Current data from XTide NOT FOR NAVIGATION
Sorry tide depth graphs only, please select another station.
12am1am2am3am4am5am6am7am8am9am10am11am12pm1pm2pm3pm4pm5pm6pm7pm8pm9pm10pm11pm
5.5542.61.30.3-0.2-0.10.61.62.73.64.14.13.72.921.31.11.31.92.944.9

Weather Map and Satellite Images
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Weather Map
wmap_P
IR Satellite Image from GEOS
west_satellite

GOES Local Image of Southwest    EDIT
Geos

Wind Forecast for Los Angeles/Oxnard, CA (12,3,4,5)
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Ground Weather Radar Station Vandenberg AFB, CA
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weather_mapweather_map weather_map

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Disclaimer:
The information on this web site has not been checked for accuracy. It is for entertainment purposes only and should be independently verified before using for any other reason. There are five sources. 1) Documents and manuals from a variety of sources. These have not been checked for accuracy and in many cases have not even been read by anyone associated with L-36.com. I have no idea of they are useful or accurate, I leave that to the reader. 2) Articles others have written and submitted. If you have questions on these, please contact the author. 3) Articles that represent my personal opinions. These are intended to promote thought and for entertainment. These are not intended to be fact, they are my opinions. 4) Small programs that generate result presented on a web page. Like any computer program, these may and in some cases do have errors. Almost all of these also make simplifying assumptions so they are not totally accurate even if there are no errors. Please verify all results. 5) Weather information is from numerious of sources and is presented automatically. It is not checked for accuracy either by anyone at L-36.com or by the source which is typically the US Government. See the NOAA web site for their disclaimer. Finally, tide and current data on this site is from 2007 and 2008 data bases, which may contain even older data. Changes in harbors due to building or dredging change tides and currents and for that reason many of the locations presented are no longer supported by newer data bases. For example, there is very little tidal current data in newer data bases so current data is likely wrong to some extent. This data is NOT FOR NAVIGATION. See the XTide disclaimer for details. In addition, tide and current are influenced by storms, river flow, and other factors beyond the ability of any predictive program.